SmartPLC SafeLine AC4S with fieldbus interfaces
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6.4
Configure safe devices at local I/O interface
Content
Remarks .................................................................................................................................................32
Add safe local device to project ............................................................................................................34
Create test signal at local output ............................................................................................................39
Remove safe local device from project ..................................................................................................39
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The safe inputs and outputs are configured via the "Device editor for logical I/Os" of
CODESYS safety. In the following sections only the AC4S-specific functions are described.
► Familiarise yourself with the following CODESYS functions!
Device editor for logical I/Os
→ Online help > Add-Ons > CODESYS Safety > Editors > Device editor for logical
I/Os
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6.4.1
Remarks
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Concept of the logical devices
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Safe devices at the local I/O interface are inserted in a CODESYS project via logical devices.
Depending on the type of the safe device the logical devices fulfil different functions.
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Safe devices at local inputs
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Mapped to the classical IPO behaviour of a programmable logic controller the logical device assumes
the functions of signal detection and signal processing. The individual functions are:
detect the signals generated by the safe devices
pre-process the signals by means of the internal logic
provide the result of the logical preprocessing as safe variable value
The programmer can configure the logical preprocessing via the parameter interface of the logical
device.
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Safe devices at local outputs
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Safe devices at the local outputs can be controlled via logical devices. The logical device fulfils the
following functions:
create a safe signal
provide the safe signal at the selected output channels at the local I/O interface